Magnetic grates



D. E. STEM MAGNETIC GRATES Dec. 8, 1964 Filed May 31, 1961 INVENTOR. DONALD E. STEM ATTORNEY United States Patent 3,160,583 MAGNETIC GRATES Donald E. Stem, 4025-37 Sebastopol Highway, Santa Rosa, Calif. Filed May 31, 1961, Ser. No. 113,894 2 Claims. (Cl. 289-223) This invention relates to magnetic grates and particularly to a plurality of magnetic grates arranged in superimposed tiers. 1

Such magnetic grates are utilized for the purpose of trapping magnetic particles from products flowing through the grates, and in some instances it is necessary to have two or more tiers of grates in superimposed relation. While the desired'advantage in collecting magnetic particles was achieved to some extent by reason of superimposed arrangement of several tiers of magnetic elements through which the products descended, yet the problem presented material difiiculty and disadvantage in that the magnetic particles accumulated and the cleaning of the respective tiers of grates became complicated and sometimes impossible because the lower tiers of grate elements were not accessible for cleaning the trapped magnetic particles from the magnetic bars of the grate; furthermore the adjacent portions of the generally superimposed portions of the magnetic bars were also inaccessible for cleaning and for removing trapped magnetic particles.

The primary object of this invention is to provide individual grates in frames adapted to be superimposed on one another and which are pivotally or hingedly connected in such a manner that the respective superimposed grates can be easily opened up and the magnetic grate bars thus rendered accessible for sweeping the trapped magnetic particles off the magnetic bars.

I am aware that some changes may be made in the general arrangements and combinations of the several devices and parts, as well as in the details of the construction thereof without departing from the scope of the present invention as set forth in the following specification, and as defined in the following claims, hence I do not limit my invention to the exact arrangements and combinations of the said device and parts as described inthe said specification, nor do I confine myself to the exact details of the construction of the said parts as illustrated in the accompanying drawings.

With the foregoing and other objects in view, which will be made manifest in the following detailed description, reference is had to the accompanying drawings for the illustrative embodiment of the invention, wherein:

FIG. 1 is a perspective view of a double trap.

FIG. 2 is a sectional view of said trap.

FIG. 3 is a perspective view of the double trap open for cleaning.

FIG. 4 is a fragmental sectional view of a top corner with the bafile open.

FIG. 5 is a perspective view of a four tier trap.

FIG. 6 is a side view of the four tier trap open.

In the illustrative embodiment of this invention shown in the drawings herein, I provide a frame 1, which is in this illustration generally rectangular. Within the confines of the frame 1 are secured a plurality of suitable parallel magnetic grate bars 2 which are spaced from one another at a suitable distance to trap metallic particles from substance or material flowing through the grate. Then a pair or more of such grates are arranged in superimposed relation.

The superimposed grates have similar frames 1 fitting on top of one another but the respective bars 2 in the respective superimposed grates are staggered or offset ice relatively to the magnetic bars 2 of the next adjacent grate.

As shown in FIG. 2, a piano hinge 3 connects the adjacent grate frames 1 along one side thereof around which hinge 3 the grates can be swung into open horizontal position, as shown in FIG. 3, to render the respective magnetic bars 2 accessible from all sides.

In case of multiple units such as the four superimposed units shown in FIG. 5, the piano hinges are on opposite sides of the respective adjacent frames alternately so as to allow the flat laying out of all four grates in a horizontal position and render them accessible from all sides for sweeping off the trapped magnetic particles.

The magnetic bars may be of any suitable construction to attract metallic particles.

In order to prevent the material to be lodged in the space between a side 4 of the frame 1 and the adjacent magnetic bar 2, an adjustable bafile 6 is provided along each side 4 of the upper frame 1 parallel with the adjacent bar 2. These baflles 6 are in the form of flat strips which are hinged to the respective top edges 7 of the top frame 1 so as to be swingable from bafiie position shown in FIG. 2 to open position for cleaning as shown in FIG. 4. When these bafiles 6 are in position, the material flowing through the grates is directed away from the space between the extreme magnetic bars 2 and the adjacent sides 4 of the frame 1 and prevent the clogging of the grate and to direct the magnetic particles to close proximity of the adjacent magnetic bars.

1 claim:

1. A multiple tier magnetic grate comprising (a) superimposed frames having walls defining the circumference of the area for the flow of material (b) spaced magnetic bars secured in each frame (c) the spaced bars being parallel with one another and the bars in each frame being in a plane spaced from the bars in the adjacent frame and being staggered relatively to the bars in the adjacent frame (d) said frames resting on one another in stacked operative position (e) means hingedly connecting adjacent walls of superimposed frames at one side of adjacent frames so that said frames are swingable about said means fi'om said superimposed position into extended side-byside position for exposing said magnetic bars (7) adjustable baflie members extending from the sides of said adjacent frames toward and along the first parallel bar on each side thereof to direct the flow of materials awayfrom the respective sides of said frames and over said grate bar.

2. The invention defined in claim 1, and a plurality of at least three such frames, and said hinged means being alternately on opposite sides of the respective superimposed frames, whereby said frames can be laid out in line at will for cleaning.

References Cited in the file of this patent UNITED STATES PATENTS 967,745 Erickson Aug. 16, 1910 1,083,423 Anderson Jan. 6, 1914 2,733,812 Holf Feb. 7, 1956 2,912,106 Martin Nov. 10, 1959 2,966,263 Holmes Dec. 27, 1960 2,992,734 Maynard July 18, 1961 3,022,893 Hasley Feb. 27, 1962 FOREIGN PATENTS 916,821 Germany Aug. 23, 1949 1,090,567 Germany Oct. 6, 1960 

1. A MULTIPLE TIER MAGNETIC GRATE COMPRISING (A) SUPERIMPOSED FRAMES HAVING WALLS DEFINING THE CIRCUMFERENCE OF THE AREA FOR THE FLOW OF MATERIAL (B) SPACED MAGNETIC BARS SECURED IN EACH FRAME (C) THE SPACED BARS BEING PARALLEL WITH ONE ANOTHER AND THE BARS IN EACH FRAME BEING IN A PLANE SPACED FROM THE BARS IN THE ADJACENT FRAME AND BEING STAGGERED RELATIVELY TO THE BARS IN THE ADJACENT FRAME (D) SAID FRAMES RESTING ON ONE ANOTHER IN STACKED OPERATIVE POSITION (E) MEANS HINGEDLY CONNECTING ADJACENT WALLS OF SUPERIMPOSED FRAMES AT ONE SIDE OF ADJACENT FRAMES SO THAT SAID FRAMES ARE SWINGABLE ABOUT SAID MEANS FROM 